journal article·2022-01-12Open access

Quasi-Epitaxial Growth of β-Ga2O3-Coated Wide Band Gap Semiconductor Tape for Flexible UV Photodetectors

Xiao Tang, Kuang-Hui Li, Yue Zhao, Yanxin Sui, Huili Liang, Zeng Liu, Che-Hao Liao, Wedyan Babatain, Rongyu Lin, Chuanju Wang, Yi Lu, Feras S. Alqatari, Zengxia Mei, Weihua Tang, Xiaohang Li

Abstract

The epitaxial growth of technically important β-Ga2O3 semiconductor thin films has not been realized on flexible substrates due to the limitations of high-temperature crystallization conditions and lattice-matching requirements. We demonstrate the epitaxial growth of β-Ga2O3(−201) thin films on flexible CeO2(001)-buffered Hastelloy tape. The results indicate that CeO2(001) has a small bi-axial lattice mismatch with β-Ga2O3(−201), inducing simultaneous double-domain epitaxial growth. Flexible photodetectors are fabricated on the epitaxial β-Ga2O3-coated tape. Measurements reveal that the photodetectors have a responsivity of 4 × 104 mA/W, with an on/off ratio reaching 1000 under 254 nm incident light and 5 V bias voltage. Such a photoelectrical performance is within the mainstream level of β-Ga2O3-based photodetectors using conventional rigid single-crystal substrates. More importantly, it remained robust against more than 20,000 bending test cycles. Moreover, the technique paves the way for the direct in situ epitaxial growth of other flexible oxide semiconductor devices in the future.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Ga2O3 and related materials · ZnO doping and properties · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Advanced Semiconductor Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia

School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 200240, Shanghai, China

Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Laboratory of Information Functional Materials and Devices, School of Science and State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

King Abdullah University of Science and Technology (KAUST), MMH Labs, Electrical and Computer Engineering, Thuwal, 23955-6900, Saudi Arabia

Funding

King Abdullah University of Science and Technology · National Natural Science Foundation of China · Gulf Cooperation Council

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